The scientific study of how we think about, influence, and relate to one another.

The mode of thinking that occurs when the desire for harmony in a decision-making group overrides a realistic appraisal of alternatives.

An unjustifiable attitude toward a group and its members.

Physical or verbal behavior intended to hurt someone.

The deep affectionate attachment we feel for those with whom our lives are intertwined.

Adjusting one’s behavior or thinking to coincide with a group standard.

The tendency for people in a group to exert less effort when pooling their efforts toward attaining a common goal than when individually accountable.

A generalized belief about a group of people.

Unselfish regard for the help of others.

The tendency for people to believe the world is just and that people therefore get what they deserve.

The tendency for people who have first agreed to a small request to comply later with a larger request.

Stronger responses on simple or well-learned tasks in the presence of others.

Unjustifiable negative behavior toward a group and its members.

The principle that the blocking of an attempt to achieve some goal creates anger, which can generate aggression.

Shared goals that override differences among people and require their cooperation.

The theory that we act to reduce the discomfort we feel when two of our thoughts are inconsistent.

The enhancement of a group’s prevailing inclinations through discussion within the group.

The tendency to favor our own group.

The tendency for any given bystander to be less likely to give aid if other bystanders are present.

Attitude change path in which people are influenced by incidental cues, such as a speaker’s attractiveness.

The tendency for observers, when analyzing another’s behavior, to underestimate the impact of the situation and to overestimate the impact of personal disposition.

The loss of self-awareness and self-restraint occurring in group situations that foster arousal and anonymity.

The theory that prejudice offers an outlet for anger by providing someone to blame.

The theory that our social behavior is an exchange process, the aim of which is to maximize benefits and minimize costs.

The percentage of people who gave at least one incorrect answer in Asch’s conformity study.